package Gameplay {
	
	import flash.display.MovieClip;
	import flash.geom.Point;
	
	// Note: All coordinates are with respect to the map of the level
	public class Boundary {
		
		private var type : String;
		private var p1 : Point; // center coordinate (circle), top left (rectangle)
		private var p2 : Point; // bottom right (+x,+y) (rectangle)
		private var noZone : Boolean = true; //indicates this area is offlimits if true, other areas are off limits if false
		
		public function Boundary(typeP:String, point1P:Point, point2P:Point, noZoneP:Boolean = true) {
			type = typeP;
			p1 = point1P;
			p2 = point2P;
			noZone = noZoneP;
		}
		
		// Returns the position of the player after taking into account this boundary
		// If the desired position is outside of the boundary, then returns desired position
		// If the desired position is inside the boundary, returns a point on the edge of the boundary
		//  that is in between the initial and desired positions
		public function calculatePosition(initialPosition:Point, desiredPosition:Point):Point {
			//TODO calculate position on the boundary
			
			switch (type) {
				case "FENCE":
					if (checkCollision(initialPosition, desiredPosition)) {
						// TODO return the position on the fence or the position beyond the fence
						return initialPosition;
					}
					break;
				case "RECTANGLE":
					if (checkCollision(initialPosition, desiredPosition)) {
						// TODO return the position on the rectangle border
						return initialPosition;
					}
					break;
				case "CIRCLE":
						// TODO return the position on the circle border Or the altered position taking to account the circle
					if (checkCollision(initialPosition, desiredPosition)) {
						// TODO return the position on the rectangle border
						return initialPosition;
					}
					break;
			}
			return desiredPosition;
		}
		
		// Does a quick check to see if the path from the initial point to desired point
		// intersects with this boundary
		// TODO make this private and use calculatePosition instead
		public function checkCollision(initialPosition:Point, desiredPosition:Point):Boolean {
			switch (type) {
				case "FENCE":
					//TODO detect collision
					
					
					break;
				case "RECTANGLE":
					if (desiredPosition.x < p2.x && desiredPosition.x > p1.x &&
						desiredPosition.y < p2.y && desiredPosition.y > p1.y)
						return noZone;
					break;
				case "CIRCLE":
					if (Point.distance(desiredPosition, p1) < Point.distance(p1, p2))
						return noZone;
					break;
			}
			
			return !noZone;
		}
	}
}